Add configuration for zsh

- Add ~/.zshrc
  + Configure on how the `history` works
  + Enable nicer `cd` and globbing behavior
  + Enable tab completion, and make them feel nicer
  + Enable VI mode and add some VI-like key bindings
- Add ~/.zlogout clearing the screen
- Add ~/.config/zsh/.zshrc and make it dispatch to ~/.zshrc
  to make `zsh` use the same configuration even on more
  recent Debian/Ubuntu machines that do not look for
  ~/.zshrc any more
- Ensure ~/.local/state/zsh/ exists

.config/zsh/.zshrc

@@ -0,0 +1,10 @@
+#!/bin/zsh
+
+# Load the real `zsh` config file in ~/
+#
+# Recent Debian/Ubuntu versions look for .zshrc
+# in ~/.config/zsh and no longer in ~/ which
+# is still the main location in many other distributions
+
+
+[ -f "$HOME/.zshrc" ] && . "$HOME/.zshrc"

.config/zsh/README.md

@@ -0,0 +1,3 @@
+# `zsh`-related Configurations
+
+This folder contains files that are sourced by `zsh`.